“The children of Israel did in accordance with everything that the Lord commanded Moses, so they encamped according to their banners, and so they traveled, each according to his families, by his patrilineal house” (Numbers 2:34). “The children of Israel did in accordance with everything that the Lord commanded Moses.” The banners are beloved before the Omnipresent, as He wrote in their regard: “As the Lord commanded Moses” (Numbers 2:33), just as it is written regarding the labor of the Tabernacle.
“So they encamped according to their banners, and so they traveled, each according to his families, by his patrilineal house.” The verse tells that immediately, Israel was swift to fulfill the word of the Omnipresent regarding the banners, and did not hesitate to perform it. “The children of Israel did….” Where was Aaron?
Rabbi Yehoshua bar Rabbi Neḥemya and Rabbi Levi bar Ḥayata in the name of Rabbi Ḥiyya bar Abba: When he came to establish their lineage, Israel said to him: ‘You are establishing our lineage? Before you come to establish our lineage, go and establish the lineage of Elazar your son. To whom is he married? Is it not to the daughter of Putiel?’
That is what is written: “Elazar, son of Aaron, took from the daughters of Putiel as a wife” (Exodus 6:25). When the Holy One blessed be He saw that they were disparaging him, He accorded precedence to the honor of Aaron relative to the honor of Moses. That is what is written: “These are the generations [toldot] of Aaron and Moses” (Numbers 3:1).